How do the side blades of an Audi R8 help with performance?

I've noticed that the Audi R8 has distinctive side blades on its body. What is the purpose of these side blades and how do they improve the performance of the car?

The side blades on the Audi R8 serve both a functional and aesthetic purpose. They help to improve aerodynamics by reducing drag and increasing downforce, which in turn improves handling and stability at high speeds. Additionally, they add a unique and sporty look to the car's design.